<template>
  <view>
    <view class="search-box"> 
      <uni-search-bar @input="input" :radius="100" cancelButton	="none"></uni-search-bar>
    </view>
    
    <!-- 搜索列表 -->
    <view class="sugg-list" v-if="searchReasults.length !== 0">
      <view class="sugg-item" v-for="(item,i) in searchReasults" :key="i" @click="gotoDetail(item)">
        <view class="goods-name">{{item. goods_name}}</view>
        <uni-icons type="right" size="16"></uni-icons>
      </view>
    </view>
    
    <!-- 搜索历史 -->
    <view class="history-box" v-else>
      <view class="history-title">
        <text>搜索历史</text>
        <uni-icons type="trash" size="20" @click="clean"></uni-icons>
      </view>
      
      <view class="history-list">
          <uni-tag inverted='true' :text="item" circle="false" v-for="(item,i) in histories" :key="i" customStyle="margin-right: 5px;" @click="gotoGoodsList(item)"></uni-tag>
      </view>
    </view>
  </view>
</template>

<script>
  export default {
    data() {
      return {
        timer: null,
        kw: '',
        searchReasults: [],
        // 搜索历史的数组
        historyList: []
      };
    },
    onLoad() {
      this.historyList = JSON.parse(uni.getStorageSync('kw') || '[ ]')
    },
    methods: {
      input(e) {
        clearTimeout(this.timer)
        this.timer = setTimeout(()=> {
          this.kw = e
          this.getSearchList()
        }, 500)
      },
      async getSearchList() {
        if(this.kw.length === 0) {
          this.searchReasults = []
          return 
        } 
        
        const {data:res} = await uni.$http.get('/api/public/v1/goods/qsearch', {query: this.kw})
        if(res.meta.status !== 200) return uni.$showMsg()
        this.searchReasults = res.message
        
        this.saveSearchHistory()
      },
      gotoDetail(item) {
        console.log(item.goods_id)
        uni.navigateTo({
          url: '/subpkg/goods_detail/goods_detail?goods_id=' + item.goods_id
        })
      },
      saveSearchHistory() {
        // this.historyList.push(this.kw)
        // 将Array数组转化为Set对象
        const set = new Set(this.historyList)
        set.delete(this.kw)
        set.add(this.kw)
        // 将Set对象转化为Array数组
        this.historyList = Array.from(set)
        
        // 对搜索历史数据,进行持久化的存储
        uni.setStorageSync('kw',JSON.stringify(this.historyList))
        },
        clean() {
          this.historyList = []
          uni.setStorageSync('kw', '[]')
      },
      gotoGoodsList(kw) {
        uni.navigateTo({
          url: '/subpkg/goods_list/goods_list?query=' + kw
        })
      }
    },
    computed: {
      histories() {
        return [...this.historyList].reverse()
      }
    }
  }
</script>

<style lang="scss">
.search-box {
  position: sticky;
  top: 0;
  z-index: 999;
}

.sugg-list {
  padding: 0 5px;
  .sugg-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 12px;
    padding: 13px 0;
    border-bottom: 1px solid #efefef;
    
    .goods-name {
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }
  }
}

.history-box {
  padding: 0 5px;
  
  .history-title {
    display: flex;
    justify-content: space-between;
    height: 40px;
    align-items: center;
    font-size: 13px;
    border-bottom: 1px solid #efefef;
    margin-bottom: 5px;
    .history-list {
      display: flex;
      flex-wrap: wrap;
    }
  }
}
</style>
